With the rapid development of technology, new things are popping up every day and are serving people in various fields. I think the word ultrasonic cleaner you should be no stranger to it, so you know what is the ultrasonic generator? Ultrasonic generator is an important part of the ultrasonic cleaning machine, his quality and matching degree directly determines the cleaning effect of the cleaning machine.
The role of the ultrasonic generator.
Ultrasonic generator, usually called ultrasonic electrical box, ultrasonic generation source, ultrasonic power supply. Its role is to convert our mains electricity (220V or 380V, 50 or 60Hz) into a high-frequency alternating current signal matched with the ultrasonic transducer. From the form of amplification circuit, you can use a linear amplifier circuit and switching power supply circuit, high-power ultrasonic power supply from the conversion efficiency considerations are generally used in the form of switching power supply circuit. Linear power supply also has its own unique range of applications, its advantage is that it can not strictly require circuit matching, allowing continuous and rapid changes in operating frequency. From the current situation in the ultrasonic industry, ultrasound is mainly divided into self-excited and it excited power supply.
Ultrasonic generator basic principle.
The principle is: by the signal generator to generate a specific frequency signal, this signal can be a sine signal, can also be a pulse signal, through the ultrasonic generator to this signal frequency to a certain value. This specific frequency is the frequency of the transducer, generally used in ultrasonic equipment to the ultrasonic frequency of 20KHz, 28KHz, 40KHz, 60KHz. power amplifier can have a variety of forms, such as electron tube class A amplifier. Class A and B amplifiers. Transistor Class A or Class B amplifier (both are analog type): transistor switching amplifier, etc. The power generally varies from 50W to 3000W
The frequency signal generated by the signal generator needs to go through impedance matching after the power amplifier, so that the output impedance matches with the transducer and drives the transducer to convert the electrical signal into mechanical vibration.
More perfect ultrasonic generator should also have feedback links, mainly to provide two aspects of the feedback signal: one is to provide the output power signal, we know that when the generator power supply (voltage) changes. The generator output power will also change, which is reflected in the transducer is mechanical vibration is large and small, resulting in unstable cleaning effect. Therefore, the need to stabilize the output power, through the power feedback signal to adjust the power amplifier accordingly, making the power amplification stable.
Features of ultrasonic generator.
1、Automatic frequency tracking: Once the device has completed the initial setup, it can operate continuously without the need to adjust the generator.
2、Automatic amplitude control: When the load characteristics change during the work of the transducer, it can automatically adjust the driving characteristics, thus ensuring that the tool head gets a stable amplitude.
3、System protection: ensure the system has strong reliability under correct operating conditions. When the system works under unsuitable operating environment (such as high temperature, over-current, over-voltage, under-voltage, system error, etc.), the generator will stop working and alarm display to protect the generator and other system components from being damaged.
4、Amplitude adjustment: The amplitude can be increased or decreased instantly during the working process, the setting range of amplitude: 0%~100%.
5、Automatic frequency search: the working frequency of the tool head can be automatically determined and stored.
Ultrasonic generator use range.
Ultrasonic generator in plastic welding, ultrasonic vibrating water mouth, woven fabric, non-woven continuous welding, slitting, sealing, shearing, sealing of plastic film and other processes have been widely used, can continuously send ultrasonic, but also according to the need to control the time of ultrasonic emission; can be triggered to operate the use, but also can be installed in the automatic production line, to achieve automatic production operations.
